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Proceedings Paper

Full size x-ray grating fabrication using large area nanoimprint
Author(s): D. L. Voronov; P. Lum; H. A. Padmore
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Paper Abstract

We developed a process for fabrication of ultra-precise blazed diffraction gratings for high resolution x-ray spectroscopy. The process based on nanofabrication techniques provides high fidelity for groove placement, high groove density, and perfect saw-tooth profile of grating grooves. A grating pattern is recorded on a quartz plate by use of e-beam lithography with a nanometer scale accuracy over the grating size. The pattern is transferred to a grating substrate by large area nanoimprint and then a hard Cr mask is formed via a lift-off process. Fidelity of the transfer step in terms of groove placement accuracy was investigated by differential wavefront interferometry. Anisotropic wet etch was applied to the patterned Si single crystal substrate to shape triangular grooves. Fabrication of a blazed grating of area 120 mm × 30 mm with groove density of 2000 lines/mm was demonstrated.

Paper Details

Date Published: 23 August 2017
PDF: 9 pages
Proc. SPIE 10386, Advances in X-Ray/EUV Optics and Components XII, 1038607 (23 August 2017);
Show Author Affiliations
D. L. Voronov, Lawrence Berkeley National Lab. (United States)
P. Lum, Biomolecular Nanotechnology Ctr. (United States)
H. A. Padmore, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 10386:
Advances in X-Ray/EUV Optics and Components XII
Christian Morawe; Ali M. Khounsary; Shunji Goto, Editor(s)

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